Event between (15810) Arawn and star UC4-351-174952 with event index number of 109766
Geocentric closest approach at 2018/03/18 00:48:39 UTC
J2000 position of star is 19:19:51.1 -19:51:21
Equinox of date position of star is 19:20:54.3 -19:49:18
Stellar brightness R=16.4,
use SENSEUP=128
Star is 75 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=23.4
TNO is 35.6 AU from the Sun
and 36.0 AU from the Earth.
The TNO is moving 16.7
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 216 seconds.
The 1-sigma cross-track error in the shadow position is
2033 km.
The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 10.4 sec chord
Diameter=70.9 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 3:2E
Star training set for 15810, (2018/03/18 00:49UT) Object RA Dec mag sep mel Antares 16:30:31.6 -26:28:15 0.9 39.55 113 Nunki 18:56:23.6 -26:16:21 2.0 8.57 81 43 Sgr 19:18:41.9 -18:55:09 4.9 1.04 75 PPM 235844 19:21:03.3 -19:19:53 7.8 0.49 75 PPM 235847 19:21:10.1 -19:52:18 9.6 0.08 75 15810 19:20:55.4 -19:49:16 16.4 74 Positions are for equinox of date
Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.
Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.
Star training set for 15810, (2018/03/18 00:49UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 39.55 113 Nunki 18:55:15.9 -26:17:49 2.0 8.57 81 43 Sgr 19:17:38.1 -18:57:11 4.9 1.04 75 PPM 235844 19:19:59.3 -19:21:59 7.8 0.49 75 PPM 235847 19:20:05.8 -19:54:23 9.6 0.08 75 15810 19:19:51.1 -19:51:21 16.4 75 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:21:37 UT
Marc W. Buie, Southwest Research Institute